My children were absolutely fine and loved everything until this one year when my son was around 3 when fear kicked in, it only lasted the one year but it was sudden and a bit of a shock. We used to do other parks including Dorney Park and Hershey so he was familiar with amusement parks and we were all usually relaxed when traveling. Imagine happy family time, all is well so we went into The Tree of Life and watched the show like every year since his birth. Then, right when we were about to get sprayed our little boy freaked out screaming, crying and then was swatting the glasses off everyone's face. He thought that we were going to get sprayed with real acid, we had to leave. This kid never cried or had tantrums so it was alarming. Also same year, wouldn't go on Haunted Mansion. Same year he was having nightmares about Crocodiles eating us from the plane, was suddenly fearful of flying, it took nearly the whole flight back to Newark for me to realize it was from Peter Pan's Flight, a little talking calmed him down. It never happened again and now it is a very cute story, we have lots of cute stories.
They LOVED picking an image for the flattened pennies, I would take a roll of quarters and collect pennies just for tis reason - alas the penny is gone so maybe dimes will work???